RedisBatchPush

This gem provide a simple way to:

watch a data in a redis queue
cache this data (buffer)
process this buffered data by time

Motivation

Sometimes you have a webserver that expect some data to come, and you have to save this data in a database. But this webserver receive a lot of requests per second, and saving in database is very expensive.

example:

your server receives:

POST /view -d '{id: 1}'
POST /view -d '{id: 1}'
POST /view -d '{id: 2}'
POST /view -d '{id: 1}'
POST /view -d '{id: 3}'

and for each post you should do

model = Table.find(id)
model.view += 1
model.save

with this gem you can reduce your data to make one incr by id

# in post
redis.lpush queue, view

# in other work
runner = RedisBatchPush::Runner.new(redis_client, queue, max_size, max_interval_sec)
runner.run do |views|
  views_by_id = views.inject({}) do |memo, item|
    memo[item["id"]] ||= 0
    memo[item["id"]] += 1
  end

  # Now you have to make 3 incr, 1 by id
  # views_by_id
  # {
  #   "1" => 3,
  #   "2" => 1,
  #   "3" => 1,
  #    ID => COUNT
  # }
  
  views_by_id.each do |id, count|
    model = Table.find id
    model.views += count
    model.save
  end
end

Installation

Add this line to your application's Gemfile:

gem 'redis_batch_push'

And then execute:

$ bundle

Or install it yourself as:

$ gem install redis_batch_push

Usage

See examples

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/manoelneto/redis_batch_push. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

License

The gem is available as open source under the terms of the MIT License.

Code of Conduct

Everyone interacting in the RedisBatchPush project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.